Rock collecting has never been quite like this! When the class forgets to do its homework, a fieldtrip through the Earth's crust, into the center of the Earth, and out through a volcano will teach them not to forget their assignments again - and then some!
by Joanna Cole and Bruce Degen. Scholastic. Copyright 1987, 40 pp. Softback.
10" x 8.4" x 0.1"